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tcg: Introduce arg_slot_stk_ofs

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Unify all computation of argument stack offset in one function.
This requires that we adjust ref_slot to be in the same units,
by adding max_reg_slots during init_call_layout.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-04-08 19:05:10 -07:00
parent 338b61e9e9
commit d78e4a4f7b
1 changed files with 17 additions and 12 deletions
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29
tcg/tcg.c
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@ -816,6 +816,15 @@ static inline bool arg_slot_reg_p(unsigned arg_slot)
return arg_slot < nreg;
}
static inline int arg_slot_stk_ofs(unsigned arg_slot)
{
unsigned max = TCG_STATIC_CALL_ARGS_SIZE / sizeof(tcg_target_long);
unsigned stk_slot = arg_slot - ARRAY_SIZE(tcg_target_call_iarg_regs);
tcg_debug_assert(stk_slot < max);
return TCG_TARGET_CALL_STACK_OFFSET + stk_slot * sizeof(tcg_target_long);
}
typedef struct TCGCumulativeArgs {
int arg_idx; /* tcg_gen_callN args[] */
int info_in_idx; /* TCGHelperInfo in[] */
@ -1055,6 +1064,7 @@ static void init_call_layout(TCGHelperInfo *info)
}
}
assert(ref_base + cum.ref_slot <= max_stk_slots);
ref_base += max_reg_slots;
if (ref_base != 0) {
for (int i = cum.info_in_idx - 1; i >= 0; --i) {
@ -4826,7 +4836,7 @@ static void load_arg_reg(TCGContext *s, TCGReg reg, TCGTemp *ts,
}
}
static void load_arg_stk(TCGContext *s, int stk_slot, TCGTemp *ts,
static void load_arg_stk(TCGContext *s, unsigned arg_slot, TCGTemp *ts,
TCGRegSet allocated_regs)
{
/*
@ -4836,8 +4846,7 @@ static void load_arg_stk(TCGContext *s, int stk_slot, TCGTemp *ts,
*/
temp_load(s, ts, tcg_target_available_regs[ts->type], allocated_regs, 0);
tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK,
TCG_TARGET_CALL_STACK_OFFSET +
stk_slot * sizeof(tcg_target_long));
arg_slot_stk_ofs(arg_slot));
}
static void load_arg_normal(TCGContext *s, const TCGCallArgumentLoc *l,
@ -4848,18 +4857,16 @@ static void load_arg_normal(TCGContext *s, const TCGCallArgumentLoc *l,
load_arg_reg(s, reg, ts, *allocated_regs);
tcg_regset_set_reg(*allocated_regs, reg);
} else {
load_arg_stk(s, l->arg_slot - ARRAY_SIZE(tcg_target_call_iarg_regs),
ts, *allocated_regs);
load_arg_stk(s, l->arg_slot, ts, *allocated_regs);
}
}
static void load_arg_ref(TCGContext *s, int arg_slot, TCGReg ref_base,
static void load_arg_ref(TCGContext *s, unsigned arg_slot, TCGReg ref_base,
intptr_t ref_off, TCGRegSet *allocated_regs)
{
TCGReg reg;
int stk_slot = arg_slot - ARRAY_SIZE(tcg_target_call_iarg_regs);
if (stk_slot < 0) {
if (arg_slot_reg_p(arg_slot)) {
reg = tcg_target_call_iarg_regs[arg_slot];
tcg_reg_free(s, reg, *allocated_regs);
tcg_out_addi_ptr(s, reg, ref_base, ref_off);
@ -4869,8 +4876,7 @@ static void load_arg_ref(TCGContext *s, int arg_slot, TCGReg ref_base,
*allocated_regs, 0, false);
tcg_out_addi_ptr(s, reg, ref_base, ref_off);
tcg_out_st(s, TCG_TYPE_PTR, reg, TCG_REG_CALL_STACK,
TCG_TARGET_CALL_STACK_OFFSET
+ stk_slot * sizeof(tcg_target_long));
arg_slot_stk_ofs(arg_slot));
}
}
@ -4900,8 +4906,7 @@ static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op)
case TCG_CALL_ARG_BY_REF:
load_arg_stk(s, loc->ref_slot, ts, allocated_regs);
load_arg_ref(s, loc->arg_slot, TCG_REG_CALL_STACK,
TCG_TARGET_CALL_STACK_OFFSET
+ loc->ref_slot * sizeof(tcg_target_long),
arg_slot_stk_ofs(loc->ref_slot),
&allocated_regs);
break;
case TCG_CALL_ARG_BY_REF_N: